US20120032815A1 - System and method for detecting a property of a strobe cover - Google Patents
System and method for detecting a property of a strobe cover Download PDFInfo
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- US20120032815A1 US20120032815A1 US12/851,958 US85195810A US2012032815A1 US 20120032815 A1 US20120032815 A1 US 20120032815A1 US 85195810 A US85195810 A US 85195810A US 2012032815 A1 US2012032815 A1 US 2012032815A1
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- strobe
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- 230000004044 response Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 18
- 240000007320 Pinus strobus Species 0.000 description 224
- 238000001514 detection method Methods 0.000 description 21
- 230000003287 optical effect Effects 0.000 description 8
- 239000003086 colorant Substances 0.000 description 7
- 230000003993 interaction Effects 0.000 description 7
- 230000011664 signaling Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000005355 Hall effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 208000032041 Hearing impaired Diseases 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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- 239000012811 non-conductive material Substances 0.000 description 1
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- 239000000523 sample Substances 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
- G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
Abstract
Description
- Fire alarm devices such as audible horns (audible/visible or A/V), loudspeakers (speaker/visible or S/V) and visible strobes (visible only or V/O), are referred to as “notification appliances.” Typically, a fire alarm control panel (FACP) drives these devices over one or more “notification appliance circuits” (NACs) for non addressable devices or “Signaling Line circuits” in the case of addressable devices. The strobes are required, for example, as an alert for the hearing-impaired, or for those in a high noise environment.
- A strobe device is typically made up of a high-intensity Xenon flash tube, an electronic control circuit, a terminal block to connect the device to the NAC, a housing, a strobe reflector assembly, and a transparent protective dome.
- The strobe device is a notification device designed to disperse its light output in a predetermined pattern. Further, the strobe may output different colors to signal a different type of alarm. For example, an amber color output of the strobe is indicative of a mass notification output. Thus, the different colors of output light aid in providing more information to occupants of a building. In order to output the desired color, the strobe device can be fitted with a strobe cover of the desired color. However, the strobe cover adds another variable when configuring and maintaining the fire alarm system. Accordingly, a need exists to aid in configuring and maintaining strobe covers for strobes in a fire alarm system.
- The present embodiments relate to methods and systems for determining at least one property of a strobe cover. The determined property of the strobe cover may then be analyzed to determine whether it is the proper property for the strobe device. The strobe cover may cover at least a part of a strobe device, such as at least a part of the strobe of the strobe device. The strobe cover, for example, may be a lens, a cap, or a filter (such as a filter that passes and/or removes certain wavelengths or certain wavelength bands of light). The property of the strobe cover may include the color of the strobe cover (such as clear, blue, amber, etc.), the shape of the strobe cover (such as a strobe cover with a lens or a strobe cover without a lens), the material of the strobe cover, etc. The method and system may include determining the property of the strobe cover and checking whether the determined property is the expected property of the strobe cover (such as the expected color of the strobe cover).
- In one aspect, a strobe cover assembly is disclosed that includes a strobe cover with one or more property indicators, and a circuit including at least one element. The indicator (or indicators) on the strobe cover indicates at least one property of the strobe cover. For example, the indicator may include a color indicator (that indicates the color of the strobe cover), a shape indicator (that indicates the shape of the strobe cover), and/or a material indicator (that indicates the material of the strobe cover). The indicator on the strobe cover interfaces with the element in the circuit, such as mechanical interfaces, electrical interfaces, magnetic interfaces, or optical interfaces. The circuit may determine the property of the strobe cover (such as the color, shape, and/or material) of the strobe cover depending on the interfacing of the indicator on the strobe cover with the element in the circuit. For example, the indicator may be placed or positioned on different portions of the strobe cover, with the location of the indicator on the strobe cover signifying to the circuit the property of the strobe cover (such as signifying the color, the shape, and/or the material of the strobe cover).
- In another aspect, a strobe device is disclosed that includes a strobe, a controller in communication with the strobe, a strobe cover including at least one indicator, and a circuit for generating an output to send to the controller, the circuit including at least one element, the at least one element interfacing with the at least one indicator in order to generate the output indicative of the property of the strobe cover.
- Other systems, methods, features and advantages will be, or will become, apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims.
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FIG. 1 is a schematic diagram illustrating a fire alarm system. -
FIG. 2 is a schematic diagram of the system ofFIG. 1 , further illustrating details of an embodiment of the present invention. -
FIG. 3 is a side view of the strobe cover and PCB mating contacts. -
FIGS. 4A-B show a view of the mounting tab and contact along section A-A (as depicted inFIG. 3 ) withFIG. 4A illustrating the mounting tab and contact prior to contact, and withFIG. 4B illustrating the mounting tab and contact after contact. -
FIG. 5 illustrates an example of a strobe cover detection circuit in which individual dedicated comparators change state when the respective contact is closed. -
FIG. 6 illustrates another example of a strobe cover detection circuit in which a single comparator monitors a group of contacts against a level shifted reference. -
FIG. 7 is an example of a flow chart in which a command is sent from FACP to the strobe to determine the color of the strobe cover of the strobe. - A system embodying one example of the present invention is illustrated in
FIG. 1 . The system includes one or more Signaling Line Circuits (SLCs), i.e.,networks 16, having alarm condition detectors D and alarm system notification devices A. Alternatively, the detectors and notification devices may be on separate networks. A system controller (such as a fire alarm control panel (FACP) 14) may monitor the detectors D. When an alarm condition is sensed, the firealarm control panel 14 may signal the alarm to the appropriate notification devices through one ormore networks 16. Notification devices may include, for example, a visual alarm (strobe), an audible alarm (horn), a speaker, or a combination thereof. - Although not necessary for carrying out the invention, as shown, all of the notification devices in a network are coupled across a pair of
power lines alarm control panel 14 and the detectors D and notification devices A. - The notification devices A may be remotely programmed using the fire
alarm control panel 14. In particular, the firealarm control panel 14 may use one or more of the following: software configuration tools; fire alarm panel displays and keypads or similar user interfaces; service port command; external computer interfaces; Internet interfaces; and modem or other remote connection interfaces. - Commands from the fire alarm panel can, for example, be multiplexed onto the device's power line, providing the added benefit that it saves the cost of additional wiring to devices. Examples of commands issued for a system with addressable notification appliances are disclosed in U.S. Pat. No. 6,426,697, which is hereby incorporated by reference in its entirety. Alternatively, the communication line to the device may be separate from the power line. The communications channel may comprise, for example, a wireless link, a wired link or a fiber optic link.
- As another example, the notification devices A may be locally programmed. Specifically, the notification device A may be programmed manually (without its removal) via any of a variety of means, including but not limited to: configuring a switch on the notification device A, jumpers, optical signaling (e.g. TV remote control, blinking flashlight, light bulb or other light source, laser pointers, breaking optical beam), a magnet tapped against the device, radio frequency (RF) tags, sound signaling (e.g. ultrasonic tones, touchtones) etc.
- Communication signals to and from the fire
alarm control panel 14 may be multiplexed onto the device's power line, or may be on a communication line that is separate from the power line. Alternatively, a fiber optic cable link or a wireless connection can be utilized. Alternatively, or in addition, the notification device A may directly communicate with the firealarm control panel 14 using for example, optical signaling (for example, an LED, an infrared emitter, etc.). The notification device A may also communicate using other means, such as RF tag reading or audio (e.g., ultrasonic, chirps, beeps, prerecorded or synthesized voice, etc.) - One, some, or all of the notification devices A may comprise a strobe device. One or more of the strobe devices may be locally configured with a strobe cover. The strobe cover may, for example, be a lens or a cap. The strobe cover may also act as a filter that passes and/or removes certain wavelengths or certain wavelength bands of light, so that the strobe device transmits a particular color of light (such as an amber color, a blue color, or a white color). The strobe cover may also have one or more properties, such as the color of the strobe cover (e.g., clear, blue, amber, etc.), the shape of the strobe cover (e.g., a strobe cover with a lens or a strobe cover without a lens), the material of the strobe cover, etc.
- For example, the strobe cover may be one of a plurality of colors. As discussed in more detail below, the strobe cover may be installed onto the notification device A through a mechanical connection (such as by using one or more mounting tabs or mounting pins).
-
FIG. 2 is a schematic diagram of the system ofFIG. 1 , further illustrating details of an embodiment of the present invention. For simplicity, the two-line network ofFIG. 1 is shown with asingle line 16. The firealarm control panel 14 includes aprocessor 42, a memory, 44, a user interface andconfiguration software 12, andnetwork interface 46. The user interface andconfiguration software 12 in combination with the processor 42 (or other type of controller) allows a user to program theindividual strobe devices 30 on the network orcommunications channel 16. The firealarm control panel 14 connects to thenetwork 16 via the network interface (communication connection) 46. -
Strobe device 30 comprises anetwork interface 24, acontroller 26, astrobe 22, amemory 32, anindicator 34, asensor 36, a strobecover detection circuit 38, and aswitch 40. Thestrobe device 30 connects to thenetwork 16 via the network interface (communication connection) 24. Thecontroller 26, such as a microcontroller or hardwired logic, receives commands from and sends data to the firealarm control panel 14. For example, the firealarm control panel 14 may send a command to activate thestrobe 22 of thestrobe device 30. As another example, the firealarm control panel 14 may send a command to request a response from thestrobe device 30, the response including an indication of the property of strobe cover installed in the strobe device 30 (such as the color, the type, and/or the material of the strobe cover), as discussed in more detail inFIG. 7 . - When the
strobe device 30 receives the command to activate thestrobe 22, thestrobe 22 flashes. Thestrobe 22 may comprise a Xenon flash tube or an LED and drive circuitry, or other high-brightness light source. Although shown separately, thememory 32 may be integrated with thecontroller 26. Theindicator 34, such as a flashing LED, may indicate a current configuration of thestrobe device 30, for example, upon command from the firealarm control panel 14, upon a local manual command such as a pushbutton (not shown), on a periodic basis, always, or upon some other event. -
FIG. 2 further includes a strobecover detection circuit 38. The strobecover detection circuit 38 may provide an input to thecontroller 26 of one or more properties of the strobe cover installed in strobe device 30 (such as the color, the type, and/or the material of the strobe cover). The strobecover detection circuit 38 may interact with the strobe cover in order for the strobecover detection circuit 38 to determine the one or more properties of the strobe cover (such as the color, the type, and/or the material of the strobe cover). The interaction of the strobecover detection circuit 38 may comprise mechanical interaction, electrical interaction, optical interaction, magnetic interaction, or any combination thereof, as discussed in more detail below. Examples of the strobecover detection circuit 38 are depicted inFIGS. 5 and 6 . As shown inFIG. 2 , the strobecover detection circuit 38 and thecontroller 26 are separate elements. Alternatively, thecontroller 26 may include strobe cover detection circuit functionality, with thecontroller 26 interfacing directly with the strobe cover. -
FIG. 2 also includes aswitch 40. Theswitch 40 may provide an operator a manner in which to manually input the property of the strobe cover installed in the strobe device 30 (such as the color, the type, and/or the material of the strobe cover). For example, theswitch 40 may comprise a 2-way switch that includes 2 positions. A first position of the 2-way switch may indicate that the strobe cover is a first color (such as clear), and a second position of the 2-way switch may indicate that the strobe cover is a second color (such as amber). When setting up the strobe device, the operator may install the strobe cover, and may also set the 2-way switch to the appropriate setting. Thecontroller 26 receives an input from theswitch 40, the input indicate the setting of theswitch 40. As another example, theswitch 40 may comprise a 3-way switch includes 3 positions. A first position of the 3-way switch may indicate that the strobe cover is a first color (such as clear), a second position of the 3-way switch may indicate that the strobe cover is a second color (such as amber), and a third position of the 3-way switch may indicate that the strobe cover is a third color (such as blue). - In addition,
FIG. 2 includessensor 36.Sensor 36 may comprise a light sensor for sensing one or more discrete wavelengths or one or more wavelength bands of light. In determining the color of the strobe cover, thecontroller 26 may command thestrobe 22 to generate an output. Thesensor 36 may sense the output, including sensing whether the output is at one or more discrete wavelengths or in one or more wavelength bands of light. For example, thecontroller 26 may controlstrobe 22 so thatstrobe 22 outputs light. Thesensor 36 may thereafter sense the light after it passes through a part of the strobe cover. Or, a light separate from the strobe 22 (such as another source element) may be used to generate light to pass through the strobe cover. Thesensor 36 may then detect light coming from the other source element, passing through the strobe cover (such as through the mounting tab of the strobe cover) and then to thesensor 36. Thesensor 36 may communicate the sensed output to thecontroller 26, which may analyze the communicated sensed output in order to determine the color of the strobe cover. For example, thecontroller 26 may determine that the sensed output is only at a blue wavelength or only in the blue wavelength band. Based on this, thecontroller 26 may determine that the strobe cover is the color blue. As another example, thecontroller 26 may determine that the sensed output is at each of the sensed wavelengths or in each of the wavelength bands. Based on this, thecontroller 26 may determine that the strobe cover is clear. - Though
FIG. 2 depictssensor 36, strobecover detection circuit 38, and switch 40, thestrobe device 30 may include only include one of those elements (such as only thesensor 36, only the strobecover detection circuit 38, or only switch 40), may include two of those elements (such as the strobecover detection circuit 38 and the switch 40), or may include all three of those elements (such as thesensor 36, the strobecover detection circuit 38 and the switch 40). -
FIG. 3 is a side view of thestrobe cover 50 and printed circuit board (PCB)electronics 62. Thestrobe cover 50 may comprise a shaped upper surface, as shown inFIG. 3 . Or thestrobe cover 50 may comprise a flat upper surface. Thestrobe cover 50 may further comprise one or more mounting tabs. Thestrobe cover 50 may include four mounting tabs. Alternatively, more or fewer mounting tabs may be used to affix thestrobe cover 50 to a part of the strobe device 30 (such as to PCB electronics 62).FIG. 3 , illustrating a side view, depicts two mountingtabs 52, 54 (or other type of mounting pins) on a bottom surface ofstrobe cover 50. Alternatively, the one or more mountingtabs strobe cover 50. - One or more of the mounting
tabs strobe device 30, such asPCB electronics 62 on an upper surface of the base of thestrobe device 30. The one or more mountingtabs strobe cover 50 or attached to thestrobe cover 50. In one embodiment, the one or more mountingtabs strobe device 30, such as a contact on thePCB electronics 62. The PCB electronics 62 (and the contacts on the PCB electronics 62) may be mounted to the housing of thestrobe device 30, so that when the mountingtabs strobe cover 50 may be provided with additional structural support. The mechanical interaction of the mounting tab with the contact may comprise the mounting tab opening the contact or closing the contact. In this way, thePCB electronics 62 may be configured to monitor for a normally-open or normally-closed contact in order to determine the property of the strobe cover (such as the color, shape or type of the strobe cover), as discussed in more detail below. - Alternatively, the strobe cover may electrically interact with the PCB electronics in order for the PCB electronics to determine the property of the strobe cover (such as the color, the type, and/or the material of the strobe cover). For example, the strobe cover may have a metallic or other conductive material placed on different portions of the strobe cover in order to indicate different properties of the strobe cover (such as different colors, different types, and/or different materials of the strobe cover). The PCB electronics may include multiple sets of contacts placed in different sections of the upper surface of the PCB electronics. Each set of contacts may normally not be electrically conductive. The conductive material may electrically connect a set of contacts, such as electrically connect the two contacts in the set of contacts, thereby indicating a particular property of the strobe cover to the controller 26 (such as a particular color, a particular type, and/or a particular material of the strobe cover).
- In an alternate embodiment, the strobe cover may optically interact with the PCB electronics in order for the PCB electronics to determine the property of the strobe cover (such as the color, the type, and/or the material of the strobe cover). For example, the PCB electronics may include one or more optical sensors. The strobe cover may be designed such that a different property strobe cover blocks a different one of the optical sensors on the PCB electronics. In this way, the optical sensor that is blocked may indicate the property of the strobe cover (such as the color, the type, and/or the material of the strobe cover).
- In still an alternate embodiment, the strobe cover may magnetically interact with the PCB electronics in order for the PCB electronics to determine the property of the strobe cover (such as the color, the type, and/or the material of the strobe cover). For example, a magnet may be placed on different portions of the strobe cover in order to indicate different properties of the strobe cover (such as different colors, different types, and/or different materials of the strobe cover). The PCB electronics may include one or more magnetic sensors (such as one or more Hall effect sensor) in order to interact with the magnet that is attached to the strobe cover. The one or more Hall effect sensors may vary its output voltage based on whether the magnet is proximate to or touching the Hall effect sensor.
- As shown in
FIG. 3 , there are a plurality ofcontacts PCB electronics 62. Depending on the placement of the mounting tab, the mounting tab mechanically interfaces with a different one of thecontacts FIG. 3 with solid mountingtab 54 designed to interface withcontact 60, and with dashed mountingtabs tab 64 is designed to interface withcontact 56, and in which mountingtab 66 is designed to interface withcontact 58. - Thus, the mounting tab may be placed in different locations on the
strobe cover 50 to indicate a different property of thestrobe cover 50, such as a different color of thestrobe cover 50. For example, the placement of mounting tab 54 (shown in solid line inFIG. 3 ) may indicate a clear strobe cover. When installed, the mountingtab 54 interfaces withcontact 60. And, the PCB electronics determines that if thecontact 60 interfaces with mountingtab 54, the PCB electronics may determine that the strobe cover color is clear, as discussed in more detail below. As another example, the placement of the mounting tab in position 64 (shown in dashed line inFIG. 3 ) may indicate an amber strobe cover. When installed, the mountingtab 64 interfaces withcontact 56. And, the PCB electronics determines that if thecontact 56 interfaces with a mounting tab, the PCB electronics may determine that the strobe cover color is amber, as discussed in more detail below. As still another example, the placement of the mounting tab in position 66 (shown in dashed line inFIG. 3 ) may indicate a blue strobe cover. When installed, the mountingtab 66 interfaces withcontact 58. And, the PCB electronics determines that if thecontact 58 interfaces with a mounting tab, the PCB electronics may determine that the strobe cover color is blue, as discussed in more detail below. In this way, thePCB electronics 62 may determine the property (such as the color) based on which of thecontacts - Further, the mechanical interaction of the mounting tab with the contact may provide mechanical support for the
strobe cover 50. For example, the mounting tab may be mechanically connected to the base unit of the strobe device by being press-fitted or snapped into the one or more contacts on the base unit. In this way, the mounting tabs may provide mechanical support to thestrobe cover 50 and provide an indicator of the property of thestrobe cover 50 to thePCB electronics 62. -
FIGS. 4A-B show a view of the mounting tab and contact along section A-A (as depicted inFIG. 3 ) withFIG. 4A illustrating the mounting tab and contact prior to contact, and withFIG. 4B illustrating the mounting tab and contact after contact. As shown inFIG. 4A , thecontact 60 is closed prior to contact with the mountingtab 54 of strobe cover 50 (e.g., the “A” part of the contact is electrically connected to the “B” part of the contact). After mechanical contact, the mountingtab 54 separates thecontact 60, as shown inFIG. 4B . The mounting tab may be made of a non-conductive material so that thecontact 60 may be interpreted by thePCB electronics 62 as an open circuit. Alternatively, the contact may be a normally open contact. The mounting tab may be composed of an electrically conductive material so that upon contact, the mounting tab may electrically close the contact. -
FIG. 5 illustrates an example of a strobe cover detection circuit in which individual dedicated comparators change state when the respective contact is closed. Thecontacts comparator 1,comparator 2, comparator 3. A reference voltage (Ref) is input to the positive input ofcomparator 1,comparator 2, comparator 3. Closing a contact changes the output of the respective comparator, which is sent tocontroller 26. For example, a change in output ofcomparator 1 indicates to controller 26 a particular property, such as that the color of the strobe cover is clear.FIG. 5 depicts a strobe cover detection circuit for detecting the color of the strobe cover. However, the circuit inFIG. 5 may likewise be used to detect different properties of the strobe cover. -
FIG. 6 illustrates another example of a strobe cover detection circuit in which a single comparator monitors a group of contacts against a level shifted reference. The positive input tocomparator 68 includes a reference voltage that is periodically shifted. The shifted reference voltage may be output fromcontroller 26. The threecontacts comparator 68.FIG. 6 depicts a strobe cover detection circuit for detecting the color of the strobe cover. However, the circuit inFIG. 6 may likewise be used to detect different properties of the strobe cover. As shown inFIG. 6 , contact 56 indicates interfacing with the “clear” mounting tab onstrobe cover 50,contact 58 indicates interfacing with the “amber” mounting tab onstrobe cover 50, andcontact 60 indicates interfacing with the “other colors” mounting tab onstrobe cover 50. Thecontroller 26 may shift the reference voltage, and then read the output to determine which of thecontacts comparator 68 indicates the property of thestrobe cover 50, such as the color of thestrobe cover 50. - Still another example of the strobe
cover detection circuit 38 may include an analog to digital converter. For example, the analog voltage may be read from a circuit that includes thecontacts controller 26. As another example, the analog voltage from the circuit that includes thecontacts controller 26, which may include an internal A/D converter. The examples of the strobecover detection circuit 38 are merely for illustration purposes. -
FIG. 7 is an example of aflow chart 70 in which a command is sent from FACP to the strobe to determine at least one property of the strobe cover of the strobe device. At 72, the FACP sends a request for a report of the strobe cover property to one or more of the strobe devices. The FACP may use theprocessor 42 in combination with the user interface/configuration software to send the request for the report. At 74, one or more strobe devices receive the command and poll their respective PCB (or other electronics) to determine the strobe cover property (such as the strobe cover color). Alternatively, the strobe device may probe the PCB independently, store the determined property of the strobe cover, and report the stored determined property when requested by the FACP. At 76, the one device sends to the FACP a response to the request. The response to the FACP includes a field indicating the property of the strobe cover (such as the strobe cover color). At 78, the FACP receives the response. The FACP may then check whether the information in the response is correct, as shown at 80. For example, the FACP may compare the strobe cover property information (such as the strobe cover color information) in the response with historical strobe cover property information (such as historical strobe cover color information) stored in a memory, such asmemory 44 illustrated inFIG. 2 , of the FACP. The historical strobe cover property information stored in thememory 44 of the FACP may indicate the expected configuration of the fire alarm system (such as the expected colors of the strobe covers of one or more strobes in the fire alarm system). If the strobe cover is determined to be correct (the expected property matches the strobe cover property information sent from the strobe device), the process ends at 84. If the strobe cover is not determined to be correct, an alert may be sent at 82. For example, the alert may be sent to a user interface at or in communication with the FACP. The alert may also comprise an electronic communication to a device external to the FACP. The alert may indicate the error to the operator. The error may be due either to installation of an incorrect strobe cover or to improper configuration of the FACP. - While the invention has been described with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention.
Claims (17)
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US9142103B2 (en) * | 2012-07-03 | 2015-09-22 | Utc Fire & Security Americas Corporation, Inc. | Mass notification alarm and system with programmable color output |
US9922509B2 (en) | 2016-01-22 | 2018-03-20 | Tyco Fire & Security Gmbh | Strobe notification appliance with directional information |
US11062574B2 (en) | 2016-01-22 | 2021-07-13 | Tyco Fire & Security Gmbh | Strobe notification appliance and emergency lighting appliance with directional information |
US11176788B2 (en) | 2019-12-12 | 2021-11-16 | Johnson Controls Fire Protection LP | Emergency notification system and method |
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US9185774B2 (en) | 2015-11-10 |
US20140103811A1 (en) | 2014-04-17 |
US8624754B2 (en) | 2014-01-07 |
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